How to Simulate a received signal on a surveillance channel?

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Linda Bendjama

Thanks Mohamad for your taking time to respond! I'll check the slides!

Salam Osama

Thanks alot for your answer, and sorry for the late response!

Well I'm working on passive radars , using fm broadcasting signal generated by simulink (matlab) (pic1 and pic11) (reference signal), I wrote a code in oder to calculate probability detection (GLRT detector), the problem that my pd generated by Montecarlo doesnt match with the theoritical one (pic2). For monte carlo method I have to generate the surveillance signal and I need amplitudes ( complex ones).

I used first : sigt(:,k)=sqrt(snrt(k)).*u(:,k) ;

snrt :is the SNR of each target "k"; U is the refrerence signal delayed and frequency shifted , I obtained "pic2"

I repeat the same oeration for every clutter (11 clutters) and for the target of interest

when I used your formula : sigt(:,k)=sqrt(0.5*snrt(k)*var(noiseSurv)/var(y)).*u(:,k); I taake var(noiseSurv) =1;

I obtained : "pic 3"

Really can't see where is the problem!!

If you can help me , It would be nice!

thanks in advance!

ps: I attached some pics!

constantine1 university

hello!

I also have the same problem with DVB-t signal I obtain the pic4

You can notice another problem that i have to go high in SNR to have an acceptable probability of detection in contrary to references (pic5)

thank you for taking time to have a look on my results!

I added the noise in my code , just not put it in the answer

I will try your formula !

Thanks again Osama

Good Luck

Amir Zaimbashi

For more information about this, see my paper entitled "GLRT-Based CFAR Detection in Passive Bistatic Radar

IEEE Trans. on Aerospace and Electronic Systems, 49, 1, 134-159, 2013"

Also, see A. Zaimbashi, Forward M-ary Hypothesis Testing Based Detection Approach for Passive Radar

IEEE Trans. on Signal Processing, 65, 10, 2659-2671, 2017